CN111799317B - Bonding apparatus and bonding method - Google Patents
Bonding apparatus and bonding method Download PDFInfo
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- CN111799317B CN111799317B CN202010731826.0A CN202010731826A CN111799317B CN 111799317 B CN111799317 B CN 111799317B CN 202010731826 A CN202010731826 A CN 202010731826A CN 111799317 B CN111799317 B CN 111799317B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/48—Preparation of the surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1866—Handling of layers or the laminate conforming the layers or laminate to a convex or concave profile
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/48—Preparation of the surfaces
- B29C2063/488—Preparation of the surfaces providing the surface with fixing elements on which the plastic liner is bonded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
- B32B37/003—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid air inclusion
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a bonding apparatus and a bonding method. The laminating device comprises a supporting component and a stretching component; a support assembly configured to support a flexible substrate, the support assembly including a first support and a second support arranged along a first direction, at least one of the first support and the second support being configured to be movable along the first direction; the supporting component is provided with an upper surface facing the flexible substrate, and the upper surface is matched with the inner surface of the flexible substrate; the stretching assembly comprises a bearing film, the middle area of the bearing film is configured to be the inner surface of the attached flexible substrate, four peripheral areas of the bearing film are respectively connected with driving pieces, the driving pieces are configured to be the peripheral areas of the stretching bearing film and drive the inner surface of the flexible substrate to be aligned and attached to the upper surface of the supporting assembly, two driving pieces are arranged oppositely in a first direction, the other two driving pieces are arranged oppositely in a second direction, and the second direction and the first direction are arranged in a crossed mode.
Description
Technical Field
The invention relates to the technical field of display, in particular to a laminating device and a laminating method for laminating a flexible substrate and a protective cover plate.
Background
With the rapid development of display technology, curved surface display technology is becoming mature, and among them, OLED (Organic Light-Emitting Diode) display technology is the most representative. Generally, after the flexible substrate is manufactured, the flexible substrate needs to be bonded to the protective cover by a tool such as a bonding device, so as to form a final curved display device.
The bending form of the flexible substrate mainly comprises four-side bending, large-angle bending and the like. Different laminating devices are generally required to be designed corresponding to the flexible substrates with different bending angles.
Disclosure of Invention
In order to solve the technical problems, the invention provides a laminating device and a laminating method, which have better compatibility for laminating a large-angle bent flexible substrate and laminating four-side bent flexible substrates.
The invention provides a laminating device, which comprises a supporting component and a stretching component; a support assembly configured to support a flexible substrate, the support assembly comprising a first support and a second support arranged along a first direction, at least one of the first support and the second support being configured to be movable along the first direction; the supporting assembly is provided with an upper surface facing the flexible substrate, and the upper surface is matched with the inner surface of the flexible substrate; the stretching assembly comprises a bearing film, the middle area of the bearing film is configured to be attached to the inner surface of the flexible substrate, four peripheral areas of the bearing film are respectively connected with driving pieces, the driving pieces are configured to stretch the peripheral areas of the bearing film and drive the inner surface of the flexible substrate to be aligned and attached to the upper surface of the supporting assembly, two of the driving pieces are arranged oppositely in the first direction, the other two driving pieces are arranged oppositely in the second direction, and the second direction and the first direction are arranged in a crossed mode.
Further, the inner surface of the flexible substrate comprises a first curved surface, a second curved surface, a third curved surface and a fourth curved surface, and the upper surface of the support assembly comprises a first support surface, a second support surface, a third support surface, a fourth support surface, a fifth support surface and a sixth support surface; the first supporting surface is formed by the first supporting body and faces away from the second supporting body, and the first supporting surface is matched with the first curved surface in shape and configured to support the first curved surface; the second supporting surface is formed by the second supporting body and faces away from the first supporting body, and the second supporting surface is matched with the second curved surface in shape and configured to support the second curved surface; the third supporting surface and the fifth supporting surface are formed on the first supporting body, the fourth supporting surface and the sixth supporting surface are formed on the second supporting body, and the third supporting surface and the fourth supporting surface are matched with the third curved surface in shape and are configured to support the third curved surface; the fifth supporting surface and the sixth supporting surface are matched with the fourth curved surface in shape and are configured to support the fourth curved surface; the third support surface and the fourth support surface are arranged along the second direction, and the fifth support surface and the sixth support surface are arranged along the second direction.
Further, the central angle corresponding to the first supporting surface is 20-80 degrees, the central angle corresponding to the second supporting surface is 20-80 degrees, the central angle corresponding to the third supporting surface is 20-80 degrees, the central angle corresponding to the fourth supporting surface is 20-80 degrees, the central angle corresponding to the fifth supporting surface is 20-80 degrees, and the central angle corresponding to the sixth supporting surface is 20-80 degrees.
Further, the first support body comprises a first sub-support body and a second sub-support body arranged along the second direction, the second support body comprises a third sub-support body and a fourth sub-support body arranged along the second direction, at least one of the first sub-support body and the second sub-support body is configured to be movable along the first direction, and at least one of the third sub-support body and the fourth sub-support body is configured to be movable along the first direction; the first supporting surface is formed by the first sub-supporting body and the second sub-supporting body together, and the second supporting surface is formed by the third sub-supporting body and the fourth sub-supporting body together.
Further, the attaching device includes a base, the first support and the second support are configured to be slidable with respect to the base, a sliding stroke of the first support is smaller than a sum of dimensions of the third support surface and the fifth support surface in the first direction, and a sliding stroke of the second support is smaller than a sum of dimensions of the fourth support surface and the sixth support surface in the first direction.
Further, the inner surface of the flexible substrate comprises a first curved surface and a second curved surface, and the upper surface of the flexible substrate comprises a first supporting surface and a second supporting surface; the first supporting surface is formed by the first supporting body and faces away from the second supporting body, and the first supporting surface is matched with the first curved surface in shape and configured to support the first curved surface; the second support surface is formed by the second support body and faces away from the first support body, and the second support surface is matched with the second curved surface in shape and configured to support the second curved surface.
Further, a central angle corresponding to the first supporting surface is not less than 90 °, and a central angle corresponding to the second supporting surface is not less than 90 °.
Further, the driving member includes a clamp for clamping the peripheral portion of the carrier film and applying a tensile force to the peripheral portion of the carrier film, and a roller for supporting the peripheral portion of the carrier film and changing a direction of the tensile force.
Further, the support assembly comprises an elastic support body, the elastic support body comprises a support main body and at least four fixing parts connected with the support main body, and the first support body and the second support body support the flexible substrate through the support main body; the laminating device comprises a base station, wherein the base station is configured to support the supporting component, the fixing parts are connected to the base station, two fixing parts are oppositely arranged in the first direction, and the other two fixing parts are oppositely arranged in the second direction.
Further, the base station includes a plurality of installation portions, the fixed part with the installation portion corresponds and connect in the installation portion.
Further, the laminating device further comprises a fixing jig, wherein the fixing jig is configured to fix a protection cover plate, and the protection cover plate is configured to be laminated with the flexible substrate; the fixed jig is arranged in a bending mode to form an accommodating space of the protective cover plate, and the protective cover plate is fixed in the accommodating space.
The invention also provides a fitting method, which adopts the fitting device for fitting and comprises the following steps: placing a flexible substrate on the supporting assembly, applying acting force through a stretching assembly to drive the flexible substrate to bend towards one side of the supporting assembly, and fixing the protective cover plate in an accommodating space formed by the fixing jig; driving the supporting assembly and the flexible substrate to enter an accommodating space formed by the fixing jig; and driving at least one of the first support body and the second support body to move to a fitting position along the first direction so as to realize the fitting of the flexible substrate and the protective cover plate.
In the above embodiment, the first support body and/or the second support body are/is arranged in a manner of being movable along the first direction, so that the support assembly can be used for supporting flexible substrates with different sizes, and the flexible substrates supported by the support assembly can enter the protective cover plate to be attached to the protective cover plate. The driving pieces arranged at the four different positions can ensure the alignment precision and the fit tightness of the flexible substrate and the supporting assembly in all directions (the first direction and the second direction). Follow-up by the extrusion at the flexible substrate between supporting component and protection apron to when realizing the laminating of flexible substrate and protection apron, the driving piece of above-mentioned four different positions departments can guarantee the laminating compactness of flexible substrate and protection apron, prevents that the bubble from leaving over between the two. Moreover, the arrangement of the driving pieces at the four different positions can ensure that the flexible substrate with four bent sides or the flexible substrate with a large bent angle can be well attached to the corresponding protective cover plate.
Drawings
Fig. 1 is a schematic front view of a flexible substrate and a protective cover sheet before bonding.
Fig. 2 is a schematic left view of the flexible substrate and the protective cover shown in fig. 1.
FIG. 3 is a schematic front view of a doubler according to an embodiment of the present invention, wherein the first support, the second support and the flexible carrier are filled with hatching.
Fig. 4 is a left side view schematically showing the attaching device shown in fig. 3.
Fig. 5 is a schematic right view of the bonding apparatus shown in fig. 3.
Fig. 6 is a partially enlarged view of fig. 3.
Fig. 7 is a schematic front view of a bonding apparatus according to another embodiment of the present invention, in which first and second supports have different structures from those of fig. 3.
Fig. 8 is a partially enlarged view of fig. 7.
Fig. 9 is a schematic view showing the bonding of the flexible substrate and the protective cover by the bonding apparatus shown in fig. 3.
FIG. 10 is a left side view of a bonding apparatus according to another embodiment of the present invention.
Fig. 11 is a schematic right view of the bonding device shown in fig. 10.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front," "back," "lower," and/or "upper," and the like are for convenience of description, and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The bending forms of the flexible substrate mainly include four-side bending (four sides are bent at small angles relative to the main body) and large-angle bending (two sides are bent at large angles relative to the main body), the bending angles of the four-side bending are usually smaller than 90 degrees, and the bending angles of the large-angle bending are usually not smaller than 90 degrees, so different laminating devices are usually required to be designed corresponding to the flexible substrates with different bending angles.
Taking a flexible substrate with four curved sides as an example, it is usually necessary to design an integrated support body with a specific shape to match the shape of the flexible substrate so as to support the flexible substrate during the bonding process. For flexible substrates with four curved sides of different sizes (e.g., different lengths or different widths), multiple supports of different sizes are required, which necessarily increases the cost of the lamination process. For a flexible substrate bent at a large angle, the bonding apparatus usually uses other types of supports to support the flexible substrate, such as two supports designed separately.
In order to overcome the defects, the invention provides a laminating device which has better adaptability to the two flexible substrates. As shown in fig. 3 to 5, the attaching device according to one embodiment of the present invention includes a support member 2 and a stretching member 3. Wherein the support member 2 is configured to support a flexible substrate 5, the support member 2 having an upper surface facing the flexible substrate 5, the upper surface being adapted to an inner surface 51 (see fig. 1 and 2) of the flexible substrate 5. The support assembly 2 is detachably mounted and includes a first support 21 and a second support 22 arranged along a first direction X, at least one of the first support 21 and the second support 22 being configured to be movable along the first direction X. The above movable arrangement of the first support 21 and the second support 22 enables the support assembly 2 to be used for supporting flexible substrates 5 with different sizes, and is also beneficial for the flexible substrates 5 supported by the support assembly to enter the protective cover plate to realize the attachment of the two. For example, for a flexible substrate bent at a large angle, after it is supported by the support assembly 2, the first support 21 and the second support 22 can be driven to be closer to each other, so that the support assembly 2 has a smaller dimension in the first direction X, and thus the flexible substrate 5 supported by it can enter and approach the protective cover more easily.
The stretching assembly 3 comprises a carrier film 31, a middle region of the carrier film 31 being configured to attach to an inner surface 51 of the flexible substrate 5. The four peripheral regions 311 of the carrier film 31 are respectively connected to one driving element 32, the driving elements 32 are configured to stretch the peripheral regions 311 of the carrier film 31 and drive the inner surface 51 of the flexible substrate 5 to align and adhere to the upper surface of the support assembly 2, two of the driving elements 32 are disposed oppositely in the first direction X, the other two driving elements 32 are disposed oppositely in the second direction Y, and the second direction Y intersects with the first direction X. The carrier film 31 facilitates the transfer and transportation of the flexible substrate 5, and facilitates the application of the force of the driving member 32 to the flexible substrate 5. The driving members 32 at the four different positions can ensure the alignment precision and the fit tightness of the flexible substrate 5 and the support assembly 2 in all directions (the first direction X and the second direction Y). When the flexible substrate 5 is subsequently extruded between the support component 2 and the protective cover plate to realize the attachment of the flexible substrate 5 and the protective cover plate, the driving pieces 32 at the four different positions can ensure the attachment tightness of the flexible substrate 5 and the protective cover plate, so as to prevent bubbles from being left between the two. Furthermore, the driving members 32 at the four different positions can ensure that the flexible substrate with four curved sides or the flexible substrate with a large angle can be well adhered to the corresponding protective cover plate.
As can be seen from the above, the supporting assembly 2 supports the flexible substrate 5, and the stretching assembly 3 can stretch the flexible substrate 5 in the first direction X and the second direction Y, so as to realize four-side bending and large-angle bending of the flexible substrate 5; the bonding method can be applied to bonding of a flexible substrate bent at a large angle or a flexible substrate bent at four sides by combining different supports (the first support 21 and the second support 22). Because the laminating device need not to carry out whole transformation when changing the supporter, is favorable to reduce cost, improves laminating efficiency.
Referring to fig. 1 and 2, the flexible substrate 5 is disposed to be attached to the protective cover 6, and the attached two may form a display device. The flexible substrate 5 and the protective cover 6 are matched in shape, and the "shape matching" means that the shapes are the same or similar to realize shape matching, so that the protective cover 6 is attached to the flexible substrate 5. The flexible substrate is, for example, an OLED flexible substrate, and can realize a basic display function.
The flexible substrate 5 has an inner surface 51 and an outer surface 52, the inner surface 51 being a non-display surface and the outer surface 52 being a display surface (a surface adjacent to a user during use) and being configured to conform to an inner surface 61 of the protective cover 6. In the illustrated embodiment, the flexible substrate 5 is a flexible substrate with four curved sides, and accordingly, the inner surface 51 includes an inner plane 510 located in the central region, and a first curved surface 511, a second curved surface 512, a third curved surface 513 and a fourth curved surface 514 located on the peripheral side and connected to the inner plane 510, the third curved surface 513 connects a first end of the first curved surface 511 and a first end of the second curved surface 512, and the fourth curved surface 514 connects a second end of the first curved surface 511 and a second end of the second curved surface 512, so that the first curved surface 511, the second curved surface 512, the third curved surface 513 and the fourth curved surface 514 are all annular. The first curved surface 511 and the second curved surface 512 are formed on the long curved side of the flexible substrate 5, and the third curved surface 513 and the fourth curved surface 514 are formed on the short curved side of the flexible substrate 5. In other words, the first curved surface 511 and the second curved surface 512 are arranged along the width direction of the flexible substrate 5 (i.e., the first direction X), and the third curved surface 513 and the fourth curved surface 514 are arranged along the length direction of the flexible substrate 5 (i.e., the second direction Y).
Referring to fig. 3 and 6, the attaching device may further include a base 1 in addition to the support member 2 and the stretching member 3. The first support body 21 and the second support body 22 of the support assembly 2 are both attached to the base 1, and the first support body 21 and the second support body 22 are both slidably provided in the first direction X with respect to the base 1. The first support 21 and the second support 22 are made of a rigid material and are not or hardly deformed during the process of supporting the flexible substrate 5. Alternatively, the base 1 is provided with a slide rail (not shown), and the first support 21 and the second support 22 are slidably mounted on the slide rail. The driving force of the first supporting body 21 and the second supporting body 22 can be provided by a motor or an air cylinder, and in this embodiment, a servo motor is selected.
The first supporting body 21 has a first supporting surface 211, a third supporting surface 213 and a fifth supporting surface 215, the first supporting surface 211 faces away from the second supporting body 22 and connects the third supporting surface 213 and the fifth supporting surface 215; the second support 22 has a second support surface 222, a fourth support surface 224 and a sixth support surface 226, the second support surface 222 faces away from the first support 21 and connects the fourth support surface 224 and the sixth support surface 226. Of course, the first supporting body 21 further includes a first plane 210, the second supporting body 22 further includes a second plane 220, the first plane 210 is respectively connected with the first supporting surface 211, the third supporting surface 213 and the fifth supporting surface 215 and jointly forms the upper surface of the first supporting body 21, and the first plane 210 is located between the third supporting surface 213 and the fifth supporting surface 215; the second plane 220 is connected to the second support surface 222, the fourth support surface 224 and the sixth support surface 226 respectively and jointly forms the upper surface of the second support body 22, and the second plane 220 is located between the fourth support surface 224 and the sixth support surface 226. The upper surface of the first support 21 and the upper surface of the second support 22 together form an upper surface of the support assembly 2, and the upper surface of the support assembly 2 is adapted to the inner surface 51 of the flexible substrate 5 to support the flexible substrate 5.
Specifically, the first supporting surface 211 matches the shape of the first curved surface 511 (see fig. 1) of the flexible substrate 5, and is configured to support the first curved surface 511 (or one long curved side) of the flexible substrate 5; the second supporting surface 222 is matched with the second curved surface 512 (refer to fig. 2) of the flexible substrate 5 in shape and configured to support the second curved surface 512 (or another long curved edge) of the flexible substrate 5; the third supporting surface 213 and the fourth supporting surface 224 as a whole match the shape of the third curved surface 513 (refer to fig. 2) of the flexible substrate 5, and are configured to support the third curved surface 513 (or one short curved edge) of the flexible substrate 5; the fifth supporting surface 215 and the sixth supporting surface 226 as a whole are matched in shape to the fourth curved surface 514 (refer to fig. 2) of the flexible substrate 5, and are configured to support the fourth curved surface 514 (or the other short curved side) of the flexible substrate 5. The first plane 210 and the second plane 220 are used for supporting an inner plane 510 (see fig. 2) of the flexible substrate 5.
It is understood that the first support surface 211, the second support surface 222, the third support surface 213, the fourth support surface 224, the fifth support surface 215, and the second support surface 226 can be regarded as circular arc surfaces. The central angle corresponding to the first supporting surface 211 is 20 to 80 °, the central angle corresponding to the second supporting surface 222 is 20 to 80 °, the central angle corresponding to the third supporting surface 213 is 20 to 80 °, the central angle corresponding to the fourth supporting surface 224 is 20 to 80 °, the central angle corresponding to the fifth supporting surface 215 is 20 to 80 °, and the central angle corresponding to the sixth supporting surface 226 is 20 to 80 °. Correspondingly, the central angle corresponding to the first curved surface 511 of the flexible panel 5 is 20 to 80 °, the central angle corresponding to the second curved surface 512 is 20 to 80 °, the central angle corresponding to the third curved surface 513 is 20 to 80 °, and the central angle corresponding to the fourth curved surface 514 is 20 to 80 °. The central angles of the first curved surface 511, the second curved surface 512, the third curved surface 513 and the fourth curved surface 514 can be used to represent the bending degree of each corresponding curved surface relative to the inner plane 510, and 20-80 ° corresponds to the bending angle of a common flexible screen with four curved sides. In the embodiment shown in the figure, the first supporting surface 211 corresponds to a central angle α of 45 ° (see fig. 6), and the central angles of the second supporting surface 222, the third supporting surface 213, the fourth supporting surface 224, the fifth supporting surface 215 and the sixth supporting surface 226 are all 45 °, so as to be used for attaching a four-side bent flexible substrate with a bending angle of 45 °.
For the flexible substrates 5 with different widths, the distance between the first supporting body 21 and the second supporting body 22 can be adjusted by driving at least one of the two supporting bodies to make the first supporting surface 211 support one long curved side of the flexible substrate 5, the second supporting surface 222 support the other long curved side of the flexible substrate 5, and the third supporting surface 213, the fourth supporting surface 224, the fifth supporting surface 215, and the sixth supporting surface 226 always support two short curved sides of the flexible substrate 5: before the first and second supports 21 and 22 move, the central regions of the two short sides of the flexible substrate 5 are supported; after the first support 21 and the second support 22 move, the end regions of the two short sides of the flexible substrate 5 are supported. It will be understood that the support of flexible substrates of the same angle but different widths can be achieved as long as it is ensured that at least one of said first and second supports 21, 22 is configured to be movable along said first direction X.
Preferably, in order to ensure effective support of the two short curved sides of the flexible substrate, the sliding stroke of the first support 21 is smaller than the sum of the dimensions of the third support surface 213 and the fifth support surface 215 in the sliding direction (i.e., the first direction X), and the sliding stroke of the second support 22 is smaller than the sum of the dimensions of the fourth support surface 224 and the sixth support surface 226 in the sliding direction (i.e., the first direction X). That is, in the first direction X, the size of the region where the flexible substrate 5 is supported is larger than the size of the region where the flexible substrate is not supported, and the first support 21 and the second support 22 can support more than half of the two short curved sides of the flexible substrate, thereby preventing the two short curved sides of the flexible substrate from being deformed without being well supported during the bonding process, and preventing the bonding effect from being affected.
The supporting assembly 2 may further include an elastic supporting body 23, wherein the elastic supporting body 23 covers the first supporting body 21 and the second supporting body 22, and is supported by the first supporting body 21 and the second supporting body 22. The elastic support 23 includes a support body 231 and at least four fixing portions 232 arranged along a circumferential direction of the support body 231, and the at least four fixing portions 232 are connected to the support body 231. Two of the four fixing portions 232 are arranged along the first direction X, and the other two fixing portions 232 are arranged along the second direction Y. The first supporting body 21 and the second supporting body 22 support the supporting body 231, so as to support the flexible substrate 5, and the supporting body 231 can deform to fit with the inner surface 51 of the flexible substrate 5; the fixing portions 232 are fixed on the mounting portion 11 of the base 1 and circumferentially position the supporting body 231, so that the problem that the supporting body 231 slides, folds and the like to affect the attaching process is avoided.
During the bonding, the elastic support 23 is deformed by a force to provide a surface matching the shape of each support surface (for fitting to the inner surface of the flexible substrate), thereby supporting the flexible substrate 5. That is, the first support 21 and the second support 22 support the flexible substrate 5 through the elastic support 23, in other words, the first support 21 and the second support 22 support the flexible substrate in direct contact, and the upper surface of the support assembly 2 is formed by the upper surface of the first support 21 and the upper surface of the second support 22; the first and second supports 21 and 22 may support the flexible substrate 5 by an elastic support or other intermediate member, in which case the first and second supports 21 and 22 only provide a supporting force without contacting the flexible substrate 5, and the upper surface of the support assembly 2 is formed by the deformed support body 231. When the elastic support is provided, the elastic support can effectively support a portion of the flexible substrate corresponding to the space 200 (see fig. 3) between the first support 21 and the second support 22, thereby facilitating an improvement in the bonding progress of the flexible substrate.
In the stretching assembly 3, the carrier film 31 is configured to be attached to one side of the flexible substrate 5 facing the base platform 1 (or the supporting assembly 2), the driving member 32 is configured to cooperate with the carrier film 31, and the carrier film 31 is stretched to drive the carrier film 31 to bend, so that the flexible substrate is in a preset bending state (in the embodiment shown, in a state of four-side bending).
The middle region of the carrier film 31 is configured to be attached to the inner surface 51 of the flexible substrate, and four peripheral regions 311 of the carrier film 31 are connected to the driving units 32, respectively. The driving member 32 includes a clamp 321 and a roller 322, the clamp 321 is used for clamping the peripheral edge 311 of the carrier film 31 and applying a pulling force to the peripheral edge 311, and the roller 322 is used for supporting the peripheral edge 311 and changing the direction of the pulling force of the peripheral edge 311. The direction of the force applied to the flexible substrate 5 by the peripheral edge 311 between the roller 322 and the flexible substrate 5 is substantially along the outer contour of the support assembly 2, so that the flexible substrate 5 is more closely attached to the support assembly 2, which is beneficial to improving the attaching precision. The provision of the roller 322 facilitates the optimisation of the positioning of the clamp 321 without the need to position the clamp 321 adjacent to the support assembly 2.
The driving member 32 is configured to stretch the peripheral edge 311 of the carrier film 31 and drive the inner surface 51 of the flexible substrate 5 to align and attach to the upper surface of the support assembly 2 (when the elastic support is provided, the upper surface of the support assembly is formed by the elastic support; when the elastic support is not provided, the upper surface of the support assembly is formed by the upper surface of the first support and the upper surface of the second support). Specifically, two of the four driving members 32 are disposed in the first direction X, and the other two of the four driving members 32 are disposed in the second direction Y. Tensile forces in the first direction X and the second direction Y are applied to the carrier film by the four driving members 32, so that the flexible panel 5 is in a four-side bent state, and the shape of the inner surface 51 of the flexible panel 5 is adapted to the upper surface of the support assembly 2.
In order to attach the flexible substrate 5 with different bending degrees (for example, a flexible substrate with two sides bent at a large angle), the support assembly 2 can be replaced (mainly, the first support 21 and the second support 22 are replaced) to match the flexible substrate 5 to be attached. Referring to fig. 7 and 8, in another embodiment, the support assembly 2 includes a first support 21 and a second support 22 different from those of the previous embodiment, but the other structures of the attaching device are the same as or similar to those of the previous embodiment. The first support 21 and the second support 22 are used for supporting the flexible substrate 5 bent at a large angle, so as to attach the flexible substrate 5 to the corresponding protective cover plate. The flexible substrate 5 has an inner surface 51, the inner surface 51 includes a first curved surface 511, an inner plane 510, and a second curved surface 512 arranged along the first direction X, and the inner plane 510 connects the first curved surface 511 and the second curved surface 512 and is located between the first curved surface 511 and the second curved surface 512. The first support 21 has a first support surface 211 facing away from the second support 22, and the second support 22 includes a second support surface 222 facing away from the first support 21. The first supporting surface 211 is matched with the first curved surface 511 of the flexible substrate 5 in shape and configured to support the first curved surface 511; the second supporting surface 222 is matched with the second curved surface 512 of the flexible substrate 5 in shape, and is configured to support the second curved surface 512.
The central angle corresponding to the first supporting surface 211 is not less than 90 °, the central angle corresponding to the second supporting surface 222 is not less than 90 °, and the central angles of the first curved surface 511 and the second curved surface 512 are not less than 90 °, which means that the bonding apparatus of the embodiment can be used for bonding a large-angle bending flexible substrate. In the embodiment shown in the figures, the first supporting surface 211 corresponds to a central angle β of 100 °, and the second supporting surface 222 corresponds to a central angle β of 100 °, so as to be used for attaching a large-angle bending flexible substrate with a bending angle of 100 °.
The base 1 is configured to: the flexible substrate may be assembled with the first support 21 and the second support 22 shown in fig. 3 for bonding the flexible substrate with four curved sides; the flexible substrate bonding apparatus can be assembled with the first support 21 and the second support 22 shown in fig. 7, and can be used for bonding a flexible substrate bent at a large angle. Stretching assembly 3 can stretch the flexible substrate on first direction X and second direction Y, realizes that the four sides of flexible substrate are crooked or big angle bending, as long as change different supporter, can realize the laminating to the flexible substrate of different angle of buckling.
Referring to fig. 9, the bonding apparatus may further include a fixing jig 4, the fixing jig 4 is configured to fix a protection cover 6, and the protection cover 6 is used for bonding with the flexible substrate 5. The fixing jig 4 is bent to form an accommodating space 40 for protecting the cover plate 6; the protective cover 6 is fixed in the receiving space 40. The flexible substrate 5 is driven by another servo motor (not shown) to move along a third direction Z (perpendicular to the length direction Y and the width direction X) together with the supporting assembly 2 supporting the flexible substrate, and enter the accommodating space 40 formed by the fixing jig, then at least one of the first supporting body and the second supporting body is driven by the servo motor to move along the first direction X to the attaching position, and the acting force continuously applied to the flexible substrate 5 by the stretching assembly 3 in the moving process can ensure the alignment and attaching precision of the flexible substrate 5 and the protective cover plate 6, and can also avoid bubbles between the flexible substrate 5 and the protective cover plate.
Fig. 10 and 11 show another support assembly 2. As shown in fig. 10 and 11, the difference from the foregoing embodiment is only in that: the first supporting body 21 includes a first sub-supporting body 201 and a second sub-supporting body 202 arranged along the second direction Y, the second supporting body 22 includes a third sub-supporting body 203 and a fourth sub-supporting body 204 arranged along the second direction Y, at least one of the first sub-supporting body 201 and the second sub-supporting body 202 is configured to be relatively movable along the second direction Y, and at least one of the third sub-supporting body 203 and the fourth sub-supporting body 204 is configured to be relatively movable along the second direction Y. The first supporting surface (similar to the first supporting surface 211 in fig. 3) is formed by the first sub-supporting body 201 and the second sub-supporting body 202 together, the second supporting surface (similar to the second supporting surface 222 in fig. 3) is formed by the third sub-supporting body 203 and the fourth sub-supporting body 204, the third supporting surface 213 is formed by the first sub-supporting body 201, the fourth supporting surface 224 is formed by the third sub-supporting body 203, the fifth supporting surface 215 is formed by the second sub-supporting body 202, and the sixth supporting surface 226 is formed by the fourth sub-supporting body 204. The other structure of this embodiment is the same as that of the embodiment shown in fig. 3, and the front view of the attaching device of this embodiment is the same as that of fig. 3.
Since the first sub-supporter 201 and the second sub-supporter 202 can move relatively and the third sub-supporter 203 and the fourth sub-supporter 204 can move relatively, the support assembly 2 can support flexible substrates of different lengths by adjusting the distance between the first sub-supporter 201 and the second sub-supporter 202 and the distance between the third sub-supporter 203 and the fourth sub-supporter 204. And the first support body 21 can move integrally relative to the second support body 22, so that the support assembly 2 can support flexible substrates with different widths. Therefore, the attaching device of the embodiment is suitable for attaching flexible substrates with different widths and different lengths, and a group of supports (including the first support and the second support) corresponds to a flexible substrate with a bending angle.
In another aspect, the present invention further provides a bonding method, in which the flexible substrate and the protective cover plate are bonded by using the bonding apparatus as described above. Please refer to fig. 9, the attaching method includes:
step S10: placing a flexible substrate 5 on the support assembly 2, applying an acting force through the stretching assembly 3 to drive the flexible substrate 5 to bend towards one side of the support assembly 2, and continuously maintaining the acting force;
step S20: fixing the protective cover plate 6 in the accommodating space 40 formed by the fixing jig 4;
step S30: driving the supporting component 2 and the flexible substrate 5 to enter the accommodating space 40 formed by the fixing jig 4;
step S40: and driving at least one of the first supporting body 21 and the second supporting body 22 to move to a preset position along the first direction X, so as to attach the flexible substrate to the protective cover plate.
Step S10 and step S20 may be performed synchronously, or sequentially, for example, step S10 is before or step S20 is before, which is not limited herein; in step S30, the predetermined position is generally determined by the width (dimension in the first direction X) of the flexible substrate 5, and when the first supporting body 21 and the second supporting body 22 are located at the predetermined position, the shape of the flexible substrate 5 can be adapted to the shape of the protective cover 6, so as to attach the flexible substrate 5 to the protective cover 6. The inner surface of the protective cover 6 may be coated with an optical adhesive for bonding the flexible substrate 5, so that the flexible substrate 5 and the protective cover 6 can be kept in a bonded state.
After the fitting is completed, at least one of the first support body 21 and the second support body 22 is driven to return to the initial position, and then the support assembly 2 is driven to leave the accommodating space 40.
The bonding method according to the above embodiment is applicable to bonding of a flexible substrate bent at a large angle and a flexible substrate bent at four sides. In the four-side bent flexible substrate, the "driving at least one of the first support 21 and the second support 22 to move to the preset position along the first direction X" in step S30 and step S40 of the attaching method of the above embodiment may be interchanged, because the bending angle of the four-side bent flexible substrate is less than 90 degrees, and therefore the corresponding protective cover plate does not block the movement of the flexible substrate toward the accommodating space, and therefore the sequence of the two movements may not be limited.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A bonding apparatus, comprising:
a support assembly detachably mounted, configured to support a flexible substrate, the support assembly including a first support body and a second support body arranged in a first direction, at least one of the first support body and the second support body being configured to be movable in the first direction; the supporting assembly is provided with an upper surface facing the flexible substrate, and the upper surface is matched with the inner surface of the flexible substrate;
the stretching assembly comprises a carrier film, the middle area of the carrier film is configured to be attached to the inner surface of the flexible substrate, four peripheral areas of the carrier film are respectively connected with driving parts, the driving parts are configured to stretch the peripheral areas of the carrier film and drive the inner surface of the flexible substrate to be aligned and attached to the upper surface of the supporting assembly, two driving parts are oppositely arranged in the first direction, the other two driving parts are oppositely arranged in the second direction, and the second direction is crossed with the first direction;
the inner surface of the flexible substrate comprises a first curved surface, a second curved surface, a third curved surface and a fourth curved surface, and the upper surface of the supporting component comprises a first supporting surface, a second supporting surface, a third supporting surface, a fourth supporting surface, a fifth supporting surface and a sixth supporting surface;
the first supporting surface is formed on the first supporting body and faces away from the second supporting body, the shape of the first supporting surface is matched with that of the first curved surface, and the first supporting surface is configured to support the first curved surface; the second supporting surface is formed on the second supporting body and faces away from the first supporting body, and the second supporting surface is matched with the second curved surface in shape and configured to support the second curved surface;
the third supporting surface and the fifth supporting surface are formed on the first supporting body, the fourth supporting surface and the sixth supporting surface are formed on the second supporting body, and the third supporting surface and the fourth supporting surface are matched with the third curved surface in shape and are configured to support the third curved surface; the fifth supporting surface and the sixth supporting surface are matched with the fourth curved surface in shape and are configured to support the fourth curved surface;
the third support surface and the fourth support surface are arranged along the second direction, and the fifth support surface and the sixth support surface are arranged along the second direction.
2. The laminating device according to claim 1, wherein the first supporting surface corresponds to a central angle of 20 to 80 °, the second supporting surface corresponds to a central angle of 20 to 80 °, the third supporting surface corresponds to a central angle of 20 to 80 °, the fourth supporting surface corresponds to a central angle of 20 to 80 °, the fifth supporting surface corresponds to a central angle of 20 to 80 °, and the sixth supporting surface corresponds to a central angle of 20 to 80 °.
3. The laminating device according to claim 1, wherein the first support body comprises a first sub-support body and a second sub-support body arranged along the second direction, the second support body comprises a third sub-support body and a fourth sub-support body arranged along the second direction, at least one of the first sub-support body and the second sub-support body is configured to be movable along the second direction, and at least one of the third sub-support body and the fourth sub-support body is configured to be movable along the second direction;
the first supporting surface is formed by the first sub-supporting body and the second sub-supporting body together, and the second supporting surface is formed by the third sub-supporting body and the fourth sub-supporting body together.
4. The laminating device according to claim 1, wherein the laminating device includes a base, the first support and the second support are configured to be slidable with respect to the base, a sliding stroke of the first support is smaller than a sum of dimensions of the third support surface and the fifth support surface in the first direction, and a sliding stroke of the second support is smaller than a sum of dimensions of the fourth support surface and the sixth support surface in the first direction.
5. The laminating device according to claim 1, wherein the driving member includes a jig for holding the peripheral portion of the carrier film and applying a tensile force to the peripheral portion of the carrier film, and a roller for supporting the peripheral portion of the carrier film and changing a direction of the tensile force.
6. The laminating device according to claim 1, wherein the support assembly comprises an elastic support body, the elastic support body comprises a support main body and at least four fixing portions connected to the support main body, and the first support body and the second support body support a flexible substrate through the support main body;
the laminating device further comprises a base platform, wherein the base platform is configured to support the supporting component, the fixing parts are connected to the base platform, two fixing parts are oppositely arranged in the first direction, and the other two fixing parts are oppositely arranged in the second direction.
7. The laminating device of claim 6, wherein the abutment comprises a plurality of protruding mounting portions, and the fixing portion corresponds to and is connected to the mounting portions.
8. The attaching device according to any one of claims 1 to 7, further comprising a fixing jig configured to fix a protective cover plate configured to attach to a flexible substrate;
the fixed jig is arranged in a bending mode to form an accommodating space of the protective cover plate, and the protective cover plate is fixed in the accommodating space.
9. A bonding method using the bonding apparatus according to claim 8, the bonding method comprising:
placing a flexible substrate on the support assembly, and applying acting force through a stretching assembly to drive the flexible substrate to bend towards one side of the support assembly; fixing the protective cover plate in an accommodating space formed by the fixing jig;
driving the supporting assembly and the flexible substrate to enter an accommodating space formed by the fixing jig;
and driving at least one of the first support body and the second support body to move to a bonding position along the first direction so as to realize bonding of the flexible substrate and the protective cover plate.
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| CN202010731826.0A CN111799317B (en) | 2020-07-27 | 2020-07-27 | Bonding apparatus and bonding method |
| US17/352,275 US11465399B2 (en) | 2020-07-27 | 2021-06-19 | Bonding device and bonding method |
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| CN202010731826.0A CN111799317B (en) | 2020-07-27 | 2020-07-27 | Bonding apparatus and bonding method |
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| CN114582240A (en) * | 2022-03-23 | 2022-06-03 | 京东方科技集团股份有限公司 | Flexible cover plate laminating device |
| TWI822379B (en) * | 2022-10-06 | 2023-11-11 | 萬潤科技股份有限公司 | Laminating methods and equipment |
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| KR102537591B1 (en) * | 2018-04-25 | 2023-06-02 | 삼성디스플레이 주식회사 | Method and apparatus for manufacturing a display device |
| CN109435411A (en) * | 2018-12-11 | 2019-03-08 | 合肥研力电子科技有限公司 | A kind of laminating apparatus and applying method of Mobile phone screen |
| KR20210152627A (en) * | 2020-06-08 | 2021-12-16 | 삼성디스플레이 주식회사 | Guide film, Method of fabricating guide film, manufacturing device for fabricating display device and method of fabricating display device |
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| CN104471630A (en) * | 2012-07-30 | 2015-03-25 | 芝浦机械电子装置株式会社 | Substrate bonding apparatus and substrate bonding method |
| KR20150100202A (en) * | 2014-02-25 | 2015-09-02 | 주식회사 아바코 | Apparatus and method of bonding a film |
| JP2019077172A (en) * | 2017-10-19 | 2019-05-23 | 陽程科技股▲ふん▼有限公司 | Curved surface bonding device and bonding method thereof |
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| US20220024196A1 (en) | 2022-01-27 |
| US11465399B2 (en) | 2022-10-11 |
| CN111799317A (en) | 2020-10-20 |
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